在新电子邮件到达时未通知MessageCountListener的服务

Question

我已经实现了一个服务,它可以检索收件箱并实现MessageCountListener接口,用于收听新的电子邮件到达.但是在新的电子邮件到达时,它不会收到通知!可能是什么原因以及还有什么可以做？这是代码:

public class EmailRetreiverService extends Service implements MessageCountListener{

public static final Vector v=new Vector();
public static final Vector nwmsg=new Vector();
Message[] m=null;
@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}
@Override
public void onCreate(){
    Log.d("EmailRetreiverStarted"," ");

    ConvertToSmtp cts=new ConvertToSmtp("myemail@gmail.com","mypassword"," "," "," ", " ");
    Folder folder=cts.retreiveInbox();
    try {
        m=folder.getMessages();
    } catch (MessagingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    for(int i=0;i<m.length;i++){
        v.add(m[i]);

    }
    Log.d("EmailRetreiverMessageCount",new Integer(m.length).toString());
    Collections.reverse(v);
    /*folder.addMessageCountListener(new MessageCountAdapter(){  

        public void messagesAdded(MessageCountEvent ev) {  
            Log.d("MessageListener","message listner invoked.");  
            Message[] msgs = ev.getMessages(); 
            TTSservice.say("Attention! "+msgs.length+" new messages have arrived now.Kindly retreive inbox again!");
            Collections.reverse(v);
            for (int i = 0; i < msgs.length; i++) {

                v.add(msgs[i]);

            //System.out.println("Got " + msgs.length + " new messages");  
            }  
            Collections.reverse(v);
            // Just dump out the new messages  

        }

    });*/
    folder.addMessageCountListener(this);
}
@Override
public void onDestroy(){
    v.removeAllElements();
}
@Override
public void messagesAdded(MessageCountEvent arg0) {
    // TODO Auto-generated method stub
    Log.d("EmailService","MessageArrived!");
}
@Override
public void messagesRemoved(MessageCountEvent arg0) {
    // TODO Auto-generated method stub
    Log.d("EmailService","MessageRemoved!");
}

必须注意的是,该服务已成功检索收件箱.但是没有得到通知.

Answer 1

您需要做一些事情来使JavaMail从服务器接收新消息的通知.一种简单的方法是定期调用getMessageCount()方法.另一种方法是使用特定于IMAP的idle()方法,该方法需要专用线程来调用该方法.